JPS63250012A - Heat resisting insulated wire - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention (Industrial Application Field) The present invention relates to a heat-resistant insulated wire, and particularly to a heat-resistant insulated wire that can be used in a high temperature range of 300° C. or higher.

(Conventional technology) Conventionally, what is known as heat-resistant insulated wire is
There are heat-resistant enamelled wires such as polyimide wire, polyamide-imide wire, and polyesterimide wire, each with a wire of 220 to 2
It has heat resistance of 50°C, 180-220°C and 1155-180°C. However, since the insulating coatings of all of these are made of organic substances, they decompose at high temperatures of about 400°C, and therefore their applications are limited to the normal temperature range of about 250°C.

On the other hand, a glass winding wire insulated by winding a glass thread once or twice around a conductor is also known as a heat-resistant insulated wire.

However, since the glass thread itself is an inorganic material, this kind of glass winding wire has excellent heat resistance. Since an organic insulating paint is applied between the wires, the heat resistance of the winding wire is only about 180°C.

(Problems to be Solved by the Invention) However, in recent years, there has been a demand for insulated wires that can be used at high temperatures of 300° C. or higher, including in nuclear power facilities. For this reason, A(20・
Inorganic insulated wires made by dispersing inorganic substances such as Cr 201 and Cr 201 in a solvent and coating and firing them on a conductor have been considered, but they lack flexibility and adhesion to the conductor, and the coating is generally porous. Currently, it has poor insulation properties and has not yet been put into practical use.

Therefore, the present invention aims to meet these conventional demands by providing a heat-resistant insulation that can be used even at high temperatures of 300°C or higher and has good flexibility, adhesion to conductors, and insulation properties. The purpose is to provide electric wires.

[Structure of the Invention] (Means for Solving the Problems) The heat-resistant insulated wire of the first invention includes (a) polycarbosilane resin, polysilastyrene resin, etc. directly on the conductor or through another insulating coating. , a coating and baking layer of a heat-resistant paint in which one or more selected from polytitanocarbosilane resin and polysilazane resin and (b) an insulating inorganic filler are dissolved or dispersed in an organic solvent is provided. It is characterized by becoming.

The heat-resistant insulated wire of the second invention includes (a) polycarbosilane resin,
One or more selected from polysilastyrene resin, polytitanocarbosilane resin, and polysilazane resin, (a') polyborosiloxane resin, and (b) insulating inorganic filler are dissolved in an organic solvent. Alternatively, it is characterized by being provided with a coated and baked layer of dispersed heat-resistant paint.

The heat-resistant insulated wire of the third invention has heat-resistant fibers wound around the conductor directly or through another insulating coating, and (a)
A heat-resistant product in which one or more selected from polycarbosilane resin, polysilastyrene resin, polytitanocarbosilane resin, and polysilasane resin and (b) an insulating inorganic filler are dissolved or dispersed in an organic solvent. It is characterized by having a coated and baked layer of color paint.

The heat-resistant insulated wire of the fourth invention has heat-resistant fibers wound around the conductor directly or through another insulating coating, and (a)
One or more selected from polycarbosilane resin, polysilastyrene resin, polytitanocarbosilane resin, and polysilazane resin, (a') polyborosiloxane resin, and (b) insulating inorganic filler. It is characterized by providing a baked layer coated with a heat-resistant paint that is dissolved or dispersed in an organic solvent.

The polycarbosilane resin, polysilastyrene resin, polytitanocarbosilane resin, and polysilazane resin (a) used in the heat-resistant paint of the present invention and the polyborosiloxane resin (a') used in the heat-resistant paint of the present invention are shown in Table 1, respectively. They consist of a main skeleton as shown in the figure below, and all have excellent heat resistance.

(Margin below) The insulating inorganic filler in Table 1 may be either a natural product or a synthetic product, such as magnesium oxide, aluminum oxide, zirconium oxide, titanium oxide,
Chromium oxide, mica, talc, potassium titanate, zirconium oxide, magnesium oxide, titanium oxide, boron oxide, aluminum oxide, thorium oxide, uranium oxide,
Oxide ceramics such as silicon oxide and zirconium silicate, non-oxides such as silicon carbide, titanium carbide, zirconium carbide, titanium boride, zirconium boride, titanium nitride, boron nitride, aluminum nitride, silicon nitride, and molybdenum silicide Examples include ceramics, E-glass, etc., and their powders, flakes, fibers, etc. are used. These may be used alone or in combination.

Furthermore, examples of organic solvents include xylene, toluene, benzene, ethanol, butanol, cellosolves, ketones, N-methyl-2-pyrrolidone, dimethylacetamide, dimethylformamide, dimethylsulfoxide, and phenols.

= 10- Silicone oil can also be used as a reaction solvent for polyborosiloxane resin.

In addition to the above-mentioned components, the heat-resistant paint of the present invention also contains silicone for the purpose of improving the flexibility, hydrolysis resistance, and adhesion of the paint film to the base material, to the extent that it does not impair the effects of the present invention. Resins and other additives can be blended.

As the silicone resin, in addition to pure silicone, silicone alkyd, silicone polyester, silicone acrylic, silicone epoxy, silicone urethane, etc. can also be used. Examples of commercially available products include Toshin Silicone TSR116, TSR117, TSR127B,
TSR144, TSR145,'/83187, YR3
168, YR3370 (all product names manufactured by Toshin Silicone Co., Ltd.), Toshin Silicone SR804, SH805, 5H8
06A, SH808, 5H840, 5H2107, S
8210g, 5H2400 (manufactured by Toshi Silicone Co., Ltd.)
Product name), Shin-Etsu Silicone KR216, KR218, K
R214, R213, KR212, R251, KR
253 (all product names manufactured by Shin-Etsu Silicone Co., Ltd.), etc.

Note that the amount of silicone resin blended is preferably in the range of 5 to 95% by weight in the resin component.

In the present invention, the above components are mixed in a predetermined ratio to form a heat-resistant paint.

The blending ratio of one or more selected from (a) polycarbosilane resin, polysilastyrene resin, polytitanocarbosilane resin, and polysilazane resin and (b) insulating inorganic filler; A) One or more selected from polycarbosilane resin, polysilastyrene resin, polytitanocarbosilane resin, and polysilazane resin; (A') polyborosiloxane resin; and (B) insulation. The blending ratio with the inorganic filler is per 100 parts by weight of one or more selected from (a) polycarbosilane resin, polysilastyrene resin, polytitanocarbosilane resin, and polysilazane resin, or ( Per 100 parts by weight of the total amount of one or more selected from a) polycarbosilane resin, polysilastyrene resin, polytitanocarbosilane resin, and polysilazane resin and (a') polyborosiloxane resin, A suitable amount is 5 to 500 parts by weight, and when the above silicone resin is added, a range of 5 to 500 parts by weight is suitable per 100 parts by weight of the total amount of the base resin and silicone resin.

If it is less than 5 parts by weight, the heat softening properties will be poor;
This is because if the amount exceeds 0 parts by weight, the mechanical properties of the coating film will become poor.

The heat-resistant paint of the present invention exhibits properties similar to organic polymer paints at room temperature, and is easy to handle and apply. Then, by heating and baking at about 500 to 600 degrees Celsius after coating, the organic components are decomposed and turned into ceramic.
A film is formed that is thin and has excellent heat resistance, with a heat resistance temperature of 400° C. or higher in regular use, 1000° C. or higher in short time use, and good heat shock characteristics. Moreover, this coating has good visibility and adhesion, and also has excellent insulation properties.

In addition, examples of the heat-resistant fiber cod used in the present invention include glass thread and ceramic fiber.
EC [145G-11 specified in IS-R-3413
0 is common. In addition, as a ceramic fiber,
Alumina fibers, quartz fibers, or ceramic fibers that are a mixture of these fibers, such as Nextel fiber manufactured by 3M Corporation, are used.

The heat-resistant electric wire of the present invention can be produced by applying and baking the above-mentioned heat-resistant paint directly onto the conductor or through another insulating coating, or by winding the above-mentioned heat-resistant paint directly onto the conductor or through another insulating coating. Added heat resistance 11! It is obtained by applying it on #11 by a conventional method and baking it integrally.

In the present invention, instead of winding the heat-resistant fibers directly onto the conductor, the above-mentioned heat-resistant paint is coated and baked on the conductor in advance, or a heat-resistant paint with good heat resistance selected from ordinary organic insulating paints is added on top of this. Alternatively, a material may be applied and heat-resistant fibers may be wrapped around it.

As the conductor of the present invention, heat-resistant Ni wire, Age!
Alternatively, it is preferable to use copper wire plated with these.

(Function) The heat-resistant electric wire of the present invention has the above-mentioned advantages, and is produced by wrapping the heat-resistant wire on a conductor directly or through another insulating coating, or on a heat-resistant fiber wound around a conductor directly or through another insulating coating. Since the structure is coated with a paint that has the same characteristics as the conventional I! It can be used satisfactorily at high temperatures of 300° C. or higher, which were previously difficult to use, and it also has good flexibility, adhesion to conductors, and insulation properties.

(Example) Next, an example will be described.

In the following examples, polycarbosilane, polysilastyrene, polysilazane, polytitanocarbosilane,
Polyborosiloxanes having the structures and molecular weights shown in Table 2 were commonly used.

(The following is a blank space) Table 2 Examples 1 to 25 Heat-resistant paints were obtained by mixing the components in the formulations shown in Tables 3 to 6.

After stirring the obtained heat-resistant paint with a mixer for 3 hours, it was applied to a 1.0T111φ nickel-plated copper wire (plating thickness: 1.5 μm) using a vertical baking machine with a furnace length of 1.21 mm. 6 at a baking temperature of 400°C and a linear speed of 8 Ill/min.
Apply and bake several times to obtain an insulated wire with an insulation thickness of 30111μ.

The properties of the insulated wire thus obtained are shown in Tables 3 to 6. In each table, comparative examples are shown in which Pyle ML (aromatic polyimide resin varnish, manufactured by DuPont) or TSf1116 (silicone resin varnish, manufactured by Toshin Silicone Co., Ltd.) was used alone as a resin component.

(Hereinafter, blank spaces) -20 Examples 26 to 45 Each component was mixed according to the formulations shown in Tables 7 to 10 to obtain a heat-resistant paint.

After stirring the obtained heat-resistant paint with a mixer for 3 hours, it was mixed into 2.
A coated wire with a coating thickness of 30n+μ was obtained by coating and baking 5 times on a rectangular copper wire of mm x 5.5u using a willow-shaped baking machine with a furnace length of 411'l at a baking temperature of 450°C and a linear speed of 3rn/min. Ta.

Then, ECD450-1/
After horizontally wrapping 0 twice, apply the same paint as above using the same equipment.
The final insulation thickness was 1701 after applying and baking twice under the same conditions.
An insulated wire of μ was obtained.

The properties of the insulated wire thus obtained are shown in Tables 7 to 10. In each table, comparative examples are shown in which a known alkyd resin, silicone resin, or Nylatol 1500 (aliphatic polyimide resin varnish, manufactured by Nitto Denko Corporation) was used alone as a resin component.

(The following is a blank space) -22 = = 25 - Examples 46 to 66 Each component was mixed according to the formulations shown in Tables 11 to 14 to obtain a heat-resistant paint.

After stirring the obtained heat-resistant paint for 3 hours, it was coated with 2,2H11x, which had a 2mm thick Ni plating on the copper surface.
[CD450-110 was double horizontally wound on a 5.5 mm rectangular copper wire, and then coated twice using a horizontal baking machine with a furnace length of 5 m at a baking temperature of 450°C and a wire speed of 3 rn/min. By baking, an insulated wire with an insulation thickness of 150n+μ was obtained.

A coated wire of 30 nμ was obtained.

The properties of the insulated wire thus obtained are shown in Tables 11 to 14. In each table, Nylatol 1500, TSR116, and R2 are used as resin components.
16 or TSl1143 (silicone resin varnish,
As a comparative example, a sample in which a material (manufactured by Toshin Silicon Co., Ltd.) was used alone is shown.

(The following is a blank space) 1') Only - L〇 - 1 30- [Effects of the invention] As is clear from the above examples, the insulated wire of the present invention can be used satisfactorily at high temperatures of 300°C or higher, which was previously difficult. This is possible, and also has good visibility, adhesion to conductors, and insulation properties.

Applicant Showa Cable and Wire Co., Ltd. Agent Patent attorney Sa Suyama - (1 other person) Procedural amendment August 28, 1982 1 Case description 1989 Patent Application No. 85386 2 Name of the invention Heat-resistant insulated wire 3 Relationship with the case of the person making the amendment Patent applicant 2-1-1 Oda Sakae, Kawasaki-ku, Kawasaki City (225) Representative of Showa Electric Wire Denhoro Co., Ltd. 1) Yoshio 4 Agent Kanda Tamachi, Chiyoda-ku, Tokyo 2-1-6 Target of amendment (2) "East" on page 11, line 14 and line 16 of the specification is corrected to "torre."

(3) "Shin-Etsu Silicone" on page 11, line 19 of the specification is corrected to "Shin-Etsu Chemical."

(4) “mμ” on page 17, line 6 and line 8 of the specification
is corrected to "μm".

(5) "Toshin Silicone" on page 17, line 14 and page 19 of the specification is corrected to "Toshin Silicone."

(6) "Shin-Etsu Silicone" on page 19 of the specification is corrected to "Shin-Etsu Chemical."

(7) Page 22 of the specification, line 5, line 8 and line 13 of the same
Correct the line rmμJ to ``μ, m type.

(8) Blank number 2r corresponding to the polycarbosilane of Example 28 in Table 7 on page 23 of the specification, , 10. insert J
.

do.

(9) In Table 7 on page 23 of the specification, "10" corresponding to the polycarbosilane of Example 29 and "5" corresponding to the polycarbosilane of Example 30 are deleted.

(10) In Table 8 on page 24 of the specification, "40" corresponding to Nylatol 1500 of Comparative Example 8 and "70" corresponding to m-cresol of Comparative Example 8 are deleted.

(11) Insert "70" in the blank column corresponding to m-cresol of Comparative Example 9 in Table 8 on page 24 of the specification.

(12) KR of Example 42 in Table 10 on page 26 of the specification
Correct "20" which corresponds to 216 to "10".

(13) In Table 10 on page 26 of the specification, "5" corresponding to mica powder in Example 45 is deleted.

(14) "mμ" on page 27, line 5, line 9, and line 10 of page 27 of the specification is corrected to "μmJ."

(15) "Toshin Silicone" on page 27, line 15 of the specification is corrected to "Toshin Silicone."

(-16) In Table 12 on page 29 of the specification, "10" corresponding to the mica powder of Comparative Example 13 is deleted, and rloJ is inserted in the blank column corresponding to the mica powder of Comparative Example 14 in the same table.

(17) "Toshin Silicone" on page 30 of the specification is corrected to "Toshin Silicone."

(18) TS of Example 64 in Table 14, page 31 of the specification
Delete "40" which corresponds to RI 16.

that's all

Claims (10)

[Claims] (1) Directly on the conductor or through another insulating coating (
(b) One or more selected from polycarbosilane resin, polysilastyrene resin, polytitanocarbosilane resin, and polysilazane resin and (b) an insulating inorganic filler dissolved or dispersed in an organic solvent. A heat-resistant insulated wire characterized by having a coated and baked layer of heat-resistant paint. (2) Per 100 parts by weight of one or more selected from (a) polycarbosilane resin, polysilastyrene resin, polytitanocarbosilane resin, polysilazane resin, (b) insulating inorganic filler The heat-resistant insulated wire according to claim 1, containing 5 to 500 parts by weight. (3) Directly on the conductor or through another insulating coating (
a) one or more selected from polycarbosilane resin, polysilastyrene resin, polytitanocarbosilane resin, and polysilazane resin, (a') polyborosiloxane resin, and (b) insulating inorganic filler. 1. A heat-resistant insulated wire comprising a coated and baked layer of a heat-resistant paint made by dissolving or dispersing a heat-resistant paint in an organic solvent. (4) Total amount of one or more selected from (a) polycarbosilane resin, polysilastyrene resin, polytitanocarbosilane resin, and polysilazane resin and (a') polyborosiloxane resin Per 100 parts by weight,
The heat-resistant paint according to claim 3, which contains 5 to 500 parts by weight of the insulating inorganic filler (b). (5) Wrap heat-resistant fibers on the conductor directly or through another insulating coating, and then (a) polycarbosilane resin,
Application and baking of a heat-resistant paint in which one or more selected from polysilastyrene resin, polytitanocarbosilane resin, and polysilazane resin and (b) an insulating inorganic filler are dissolved or dispersed in an organic solvent. A heat-resistant insulated wire characterized by having layers. (6) Per 100 parts by weight of one or more selected from (a) polycarbosilane resin, polysilastyrene resin, polytitanocarbosilane resin, and polysilazane resin, (b) insulating inorganic filler The heat-resistant insulated wire according to claim 5, containing 5 to 500 parts by weight. (7) The heat-resistant insulated wire according to claim 5 or 6, wherein the same heat-resistant paint as the coated and baked layer on the heat-resistant fiber is coated and baked as another insulation coating. (8) Wrap heat-resistant fibers on the conductor directly or through another insulating coating, and (a) polycarbosilane resin,
One or more selected from polysilastyrene resin, polytitanocarbosilane resin, and polysilazane resin, (a') polyborosiloxane resin, and (b) insulating inorganic filler are dissolved in an organic solvent. Alternatively, a heat-resistant insulated wire is provided with a coated and baked layer of dispersed heat-resistant paint. (9) Total amount of one or more selected from (a) polycarbosilane resin, polysilastyrene resin, polytitanocarbosilane resin, and polysilazane resin and (a') polyborosiloxane resin Per 100 parts by weight,
The heat-resistant insulated wire according to claim 8, containing 5 to 500 parts by weight of the insulating inorganic filler (b). (10) The heat-resistant insulated wire according to claim 8 or 9, wherein the same heat-resistant paint as the coated and baked layer on the heat-resistant fiber is coated and baked as another insulation coating.